The lawyer who tried to shake down Chevron loses his law license.

Plaintiff attorney Steven Donziger’s attempted looting of Chevron for spurious environmental crimes in Ecuador ranks among the biggest legal scams in history. The law finally caught up to Mr. Donziger this week as a New York court pulled his legal license.

Readers may recall Mr. Donziger’s years-long effort to shake down Texaco (now merged with Chevron) for its alleged failure to clean up oil pits that it had drilled in Ecuador during the 1970s. Chevron claimed it had cleaned up the pits, but the plaintiff attorney exploited...